Fixed formatting issue in Bing chapter"
Fixed formatting issue in Bing chapter"

jxltom/tango_with_django_19,jxltom/tango_with_django_19,leifos/tango_with_django_19,leifos/tango_with_django_19,leifos/tango_with_django_19,jxltom/tango_with_django_19